Chapter 7 Portable Fire Extinguishers
During inspection, if a portable fire extinguisher is found deficient in weighty by ____ percent, it should be removed from service and replaced.
10
Which NFPA standard is the Standard for Portable Fire Extinguishers?
10
Class K fire extinguishers are tested to ensure an effectiveness against ____ square feet of light cooking oil in a deep fat fryer.
2.25
The reach of a Carbon Dioxide extinguisher is
3-8 feet
Under normal conditions Stored-Pressure water extinguishers can obtain a fire stream of
30-40 feet
What application method is used with an aqueous film forming foam (AFFF) extinguisher in order to prevent disturbing the fuel?
Allow foam to gently rain down onto fuel surface
Underwriter's laboratories has assigned a numerical rating system for Class A water fire extinguishers based on the extinguisher's
Amount of extinguishing agent and the duration and range of the discharge.
How often should portable fire extinguishers be removed from service for maintenance?
Annually
Which of the following statements BEST describes how to prevent scattering of lightweight fuels?
Apply the agent from point where it reaches, but does not disturb, the fuel surface.
Portable fire extinguishers should be considered
As a primary means of extinguishing incipient fires.
What type of portable fire extinguisher is discharged in the form of gas and works on Class B and Class C fires?
Carbon dioxide
What classification of portable fire extinguisher is used for fires that involve combustible liquids and gases?
Class B
What portable fire extinguisher rating is based on the approximate square foot (square meter) area of flammable liquid a non-expert operator can extinguish?
Class B rating
What classification of portable fire extinguisher is used for fires that involve combustible metals and alloys?
Class D
What portable fire extinguisher rating considers both the toxicity of the extinguishing agent and the toxicity of fumes produced when the agent is applied?
Class D rating
What classification of portable fire extinguisher is used on fires that involve combustible cooking oils?
Class K
Which of the following extinguishers were designed specifically as replacements for Halon 1211?
Clean Agent extinguishers.
One hazard in using CO2 extinguishers is
Contact with the discharge horn may cause electrical shock
The first step in extinguishing a Class C fire is to
Disconnect the power to whatever is burning.
What type of portable fire extinguisher has agents mixed with small amounts of additives to prevent caking?
Dry Chemical
What type of portable fire extinguisher may produce a cloud that reduces visibility when discharged?
Dry chemical
What type of portable fire extinguisher may be applied with either an extinguisher or a scoop?
Dry powder
What expelling mechanism works when the operator physically applies pressure to a pump that increases pressure within the container?
Manual pump
The secondary mode in which Water extinguishes a fire is through
Oxygen Depletion
Which compound would you NOT expect to find in dry chemical extinguishers?
Potassium Chlorate
What is the principle agent of a Wet Chemical fire extinguisher?
Potassium acetate
What type of portable fire extinguisher is intended primarily for ground cover fires?
Pump-type water
Which method of extinguishing works by excluding oxygen from the burning process?
Smothering
What type of portable fire extinguisher is often used for extinguishing confined hot spots during overhaul?
Stored-pressure water
What type of portable fire extinguisher uses air stored in the tank to force water up a siphon tube when operated?
Stored-pressure water
Which statement BEST describes portable fire extinguisher selection?
The correct extinguisher will minimize risk to life and property.
What is meant by 'Saponification'?
The fire is extinguished by forming an oxygen-excluding soapy foam surface.
You are responding to MCDONALDs where the deep frier oil cooking the french fries as burst into flames. Which of the following extinguishers would you use to extinguish this fire?
Wet Chemical Stored-Pressure extinguisher.
What classification of portable fire extinguisher is intended for use on Class K fires?
Wet chemical stored-pressure
Stored-pressure water extinguishers are normally compressed with what gases?
air and nitrogen
Aqueous film forming foam (AFFF) extinguishers are not suitable for:
class C, D, and K fuels
The resulting foam from an aqueous film forming foam (AFFF) extinguisher will ____ fuels lighter than air.
float on the surface of
Once the proper extinguisher is selected, you must perform a visual inspection to ensure the extinguisher:
is charged and operable.
Once the proper extinguisher is selected, you must check to ensure the pressure gauge:
is in the operable range.
Signal to others that a portable fire extinguisher is empty by:
laying it on its side.
NFPA 10 requires inspection of portable fire extinguishers at least:
once a year.
The P in the PASS acronym stands for:
pull pin by breaking wire or seal.
Do not remove the safety pin on a portable fire extinguisher until:
ready to use the extinguisher.
On a multiple marking extinguisher the ratings for each class are:
separate, they do not affect each other.
Portable fire extinguishers should be chosen based on the:
type of fuel that is burning.